Oh i'm gonna find out what it does, lol, im a houndog when it comes to stuff like this, in other words i can't let it rest, i wanna know what that plug does!!! , there is a guy I'm acquainted with but i haven't been able to track him down and he knows about everything on these cars,stuff like "yeah in 89 they used a 3/8 s bolt on such a part but in 90 they went to 7 1/6s and so forth", that kind of guy, he'll know.
Interesting about the car being a previous 4 banger that just contributes to the mystery,i saw a video awhile back about a 93 Cobra and a lot of stuff i didn't know like how the intakes had that extra little piece of metal for harmonics or something like that??